Roddick rests

U.S. Open and Olympic U.S. Champion Andy Roddick relaxes between sets during match against Andy Murray on day two of the Miami Tennis Cup at Crandon Park Tennis Center

U.S. Open and Olympic U.S. Champion Andy Roddick relaxes between sets during match against Andy Murray on day two of the Miami Tennis Cup at Crandon Park Tennis Center (Al Diaz, Miami Herald Staff SoFlaShare)

U.S. Open and Olympic U.S. Champion Andy Roddick relaxes between sets during match against Andy Murray on day two of the Miami Tennis Cup at Crandon Park Tennis Center